Telephone-transmitter.



D. H. WILSON. TELEPHONE TRMNTSMITIR.-

APPLICATION FILED DEU. 3U, 180.4.

1,048,253. Patented Deo. 24, 1912.

Unrrnn sfrafrias PATENT manier..

DAVID H. WILSON, CHICAGO, ILLINOIS, ASSIGNOR. BY MESNE ASSIGNMENTS. TODAVID H. WILSON AND ROBERT BINES. TRUSTEES. OF NBV] YORK. N. Y.

TELEPHONE-TRANSMITTER.

Specification of Letters Patent.

Patented Dec. 2114191?.

l Application inea December so. 1904. serial No. 238.38m

To f1.1/ Ir/io//f if may conce/'a lie .'t lniown that l` Divin ll.Wilson'. a citizen ot' the lUnited States, residing at Chicago, in thecounty ol? Cook and State of l'llinoishave invented a certain new anduseful improvement in Telcphone-Transmitters, oi which 'the followingisa specifi cation.

'My invention relates to telephone trailsnntters. and has for its objectto provide a `new and improveddevce ot this descrip- In carrying outmyinvention provide` two diapliragms A and B attached to'snitable sidepieces A1 B1. These liaphragms' I may be ot' any material ordinarily`used, or may be of mica or the like. lonnected with these diaphragnisare the telt-.scoping receptacles or cups A2 Ba containing suitableconducting material, such as granulated carbon. Each cup may be providedwith one or more buttons A5 B3 of metal. carbon. gold plated carbon. orthe like. The teleseoping cups may be made in any desired manner. As

.herein shown these cups are provided with bottoms i t ll" which act asdiaphragme and which may be called auxiliary diaphraems. These auxiliarydiaphragms may be ma e of conducting material or non-conducting materialsuch as mica or the like. tomsl of the cups may be held in position bymeans of the holding pieces NMBS. each of which consists of an annularring having a projecting part to engage the bottoni of the cup, the ringbeing threaded so as -to be screwed upon the body of the cup.'Interposed between the diaphragms A. and B and the cups A2 B2 are theintermediate pieces A6 B, the screws or other attaching `means A," BTpassing through these intermediate parts and acting as connecting piecesto which areconnected the conductors AS B8.

-This arrangement leaves the cups free from the. diaphragme A and B,except at the cenbe 'lurther secured by screws D. o1-

Tlie botand ll as hereirv shonn :ere considerahlv larger than theteleseopmg rups and project beyond the edges thereot. f l'v means ot'thi.`I construit-tion and the attarlunent ot' the oups at the middle otthe diaphri'fmy rated by a separating piece tl. and a screw.

threaded ring C1 engages both side pie|e.- A1 B1. thus holdingr theparts firmly in position. ,moutli-pieee D provided with two branches D?D: is used. the brain-lies communicating respectivel)v with the sidepieces .V Pf. The'mouth-piece ma) be held in position in anvdesiredmanner. Ae herein lshown the .side pieces and PN are provided withannular projections A" li and the branches oi the mouth-piece are sprungout so that when the ends are placed within these annular projectionsthe part will be held in place. The parts may also tlnl screws or otherattaching devices may he used without the annular projections.

l' have described in detaila particular construction embodying mvinvention. but it is oi course evident that the part.` may h varied in'many particulars without departing from the spirit ot m v invention. lthererore do not limit mvseltto the partit-u- -lar construction shown.

The use and operation of m v invention are as follows: Il hen the part-sare in proper position the operator Talks into the mouthpiece D. The vib`ations offI the air thus produced act upon both diaphragme A andB andcause them to vibrate. This produces a movement of the telescoping cups,the cups moving frcelj1 one within the other so as to move the auxiliarydiapliragms to and from.

each other andl vary the resistance between the electrodes. It will beseen that iii this construction the carbon is confined between twomovable electrodes both of which move tion Iam enabled to provide atransmitter of very great eiiiciency andadaptability.

This transmitter consists of a'V receptacle, as

it were, divided into threechambers, each of the outer chambersprovided,\vith a connecf f tion which lea-ds to'a suitable mouth-piece,

vof the transmitter.

the other chamber containing the electrodes It will further be seen thatthe vibrations due to the voice of the A telephone "transmittercomprising a fdiaphragnr` a carbon holding cup associated .with saiddiaphragm so as to mov'ethere'- f with, a flat flexible diaphragmforming the bottom of said cup, an electrode within said cup andresting' upon saidflat flexible dia- `so as to'hold thenrftogether, anda telescopi phragm, a connecting piece passingthrough the firstmentioned diaphragm and the cup ing' part nfor said carbonl cup. 2. A4telephone transmitter comprising a diaphragm, a carbon holding` cupattached lto said diaphragm near the middle thereof, aseri'es ofseparate conducting buttons having non-parallel edges and connected witht,.e bott-om of said carbon cup and separated by the granulated carbonin the cup, each of saidbuttons located at one side of the .central axisof the cup, 'and a central conduct- ?ing button surrounded by saidseparated buttons.

l 3. A telephone transmitter comprising a diaphragm, a carbon holdingcupattached to said diaphragm near the ,middle thereof,

an intermediate connecting' piece and separate from the cup anddiaphragm engaging the diaphragmv and the outside of the bottom of thecarbon holding' cupysa'id. carbonv holding; cup smaller in diameterthan. the

diaphragm, a series .of separated electrodes connected with the bottomof said cup, and

a, telescoping. part eoperating gai two side pieces, aA separating ringbetween a them, two' diaphragms lheld' between said side pieces andseparating ring, and a eonneet-ing` piece outside ofsaidseparating'ri'ng 60 and engaging,- the two side pieces.

6. A 'telephone 'transmitter comprising two opposed diaphragme, twotelescopingz,` carbon cups between said diaphragme and smaller than thediaphragme so that the`diaphra-gms project beyond the edges thereof, oneof vsaid carbon cups connected to each diaphragm.4

7. A` telephone `tranSmitterj comprising" two opposed diaphragme, twotelescoping carbon cups interposed between them, 4each provided with'abottom separate from the cup, the bottoms loit said cups' connectedrespectively with the said diaphragme, and an intermediate piece betweeneach c up and its associated diaphragm. F 8. Atelephone'transmitter.consist-ing ot a receptacle divided intothree-chambers each of the exterior chambers: provi-ded with, an outletwhichleads to a mouth-piece, the interior chanhlnr provided .withopposed'. electrodes eachr of which'is adapted to be moved whilethedevice is being used, opL posed" diaphragms 'carrving saidelectrodes, telescoping cups on said diaphragme, said electrodescontained within telesicoping);` cups which -cooperate with each other.v

. -DAVlD H. WILSON.'

l .lVitnesses:

HOMER L. KRAFT, EDNA K.v REYNOLDS.

